Motor fuel



Patented May 1, 1928.

UNITED ST TES- PATENT; "orncsp THOMAS MIDGLEY, JB., OF DAYTON, OHIO, ASSIGNOBi, BY MESNE ASSIGNMENTS, To GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION 01' DELAWARE.

no Drawing.

This invention relates to a motor fuel, and

to the burning of fuel mixtures-in an 111-.

ternal combustion engine in the presenceof substances added to a fuel or fuel mixture, 6 including a compound'of a metal, and, more particularly, a compound such as lead tetra ethyl, which decreases fuel knock. The present application is a continuation in part of '20 parts of ethylene dibromide, 7 parts of monochlorinated naphthalene, and .5 parts of propylene dibromide. 4 cc. of this composition is added to a gallon of kerosene or gasoline, a fuel-air mixture is formed and 26 the mixture is burned in an internal combustion engine. The composition vaporizes in the engine cylinder, and the gasoline or kerosene is burned in the presence of these vaors. One of the products of combustion 30 is lead bromide. The ethylene dibromide and propylene dibromide are the source for the bromine which combines with the lead and so reduces the formation of lead oxide which fluxes more readily with engine parts such as spark plug points. Either the chlorinated naphthalene or the bromide compound may be omitted but the use of both 18 preferred.

Keroseneand gasoline are named merely to as common examples of low compression fuels which give a fuel knock when a gaseous mixture containing the fuel is burned under relatively high compression. The com osition given reduces the fuel knock. Tlie composition may be varied by chang ing the proportions and by using other chemical compounds. Other halogenated aromatic compounds such as brominated or chlorinated benzol, or brominated or chlorinated toluene or oils having similar physical characteristics including stability at relatively high temperatures may be used -in place of mono-chlorinated naphthalenemoron FUEL.

Application as January s, 1925. Serial No. 918.

Apparently these compounds give lubrication and protection to valve stems.

A mixture of ethylene dibromide and propylene dibromide is preferred in cold weather because of its low freezing point. I may use in the fuel either of these or ethylene chlorobromide, butylene chlorobromide, amylene chlorobromide, tribromaniline, ethyl bromide, or other bromide compounds.

-While the bromide compounds are now preferred to the chlorine compounds, I ma use ethylene dichloride, propyline dichlori e, or butylene dichloride, trichloranilineor other chloride compounds. The quantity of each of these used depends on the amount of their halide content Since the bromide compounds are, generally, more effective than the chloride compounds, the quantity of bron gldes used may be smaller than the chlo- 1'1 es.

The lubricant,

with compounds of othenmetals, such, for example, as arsenic, tin, nickel, iron, zinc, and many others. The hydrocarbon compounds of the metals such as the alkyl compounds, and the carbonyl compounds such as become volatile under engine conditions are best adapted to reduce fuel knock.

What I claim is:

1. A motor fuel comprising a hydrocarbon, a volatile compoundof a metal, and a halogenated lubricating oil.

2. A motor fuel comprising a hydrocarbon, a volatile compound of a metal, a. halogenated lubricating oil and a substance adapted to form on combustion, a non-fluxing compound with said metal. I

3'. A motor fuel comprising a hydrocarv such as a halogenated arolllfllllc compound, has been found effective bon, a volatile .compound of a metal and a halogenated oil.

4. A motor fuel comprising a hydrocar bon, a volatile compound of a metal and achlorinated oil.

5. A motor fuel comprising a hydrocarbon, a volatile compound of a metal, and a lubricant. v

' 6. A motor fuel comprising a hydrocarbon, a volatile compound of lead and a halogenated lubricating oil. I

.7. A motonfuel comprising a hydrocarn, a volatile compound of lead and a halogenatedoil. I

8. A motor fuel comprising a hydrocarbon, a volatile compound of lead, and a chlorinated oil.

V 9. A motor fuel comprising a hydrocarbon, a volatile lead compound and a volatile bromide compound. 7

10. A motor fuel comprisinga hydrocarbon, a hydrocarbon compound of lead, and a volatile bromide compound.

11. A motor fuel comprising a hydrocarbromide compound.

12. A motor fuel comprising a hydrocarbon, lead tetraethyl, and ethylene dibromide.

13. A motor fuel comprising a hydrocar- 80 bon, a volatile lead compound, a volatile halide compound, and a lubricant. 14. A motor fuel comprising a hydrocarbon, a volatile lead compound, a volatile bromide compound, and a ubricant.

:5 bon, a lead alkyl compound, and a volatile bon, a lead alk 15. A motor fuel comprising a: hydrocar- 1 compound, a volatile bromide compoun and a halogenated oil.

16. A motor fuel comprising a hydrocarbon, lead tetra ethyl, ethylene dibromide, and mono-chlorinated naphthalene.

17. A composition of matter comprising a volatile compound of a metal, and a halogenated lubricating oil.

18. A composition of matter comprising a vfilatile metal compound and a halogenated o 19. A composition of matter comprising a volatile lead compound and a halogenated aromatic compound.

20. A composition of matter comprising a lead alkyl compound and a chlorinated oil.

21. A composition of matter comprising a volatile lead compound and a volatile bromide compound.

22. A composition of matter comprising a lead alkyl compound and a volatile bromide compound.

23. A composition of matter comprising I lead tetra ethyl and a volatile bromide compound.

24. A composition of matter comprising a lead alkyl compound, a volatile bromide compound and a halogenated oil.

25. A composition of matter comprising lead tetra ethyl, ethylene dibromide, and mono-chlorinated naphthalene.

THOMAS MIDGLEY, JR. 

